Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Dr. Brian Reza Poustinchian, D.O.
Hospitalist Physician in Geneva, IL · enumerated 2010.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1649591371
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Registry record
Entity type Individual (Type 1)
Name Dr. Brian Reza Poustinchian
Credential D.O.
Sex Male
Practice address 300 Randall Rd, Geneva, IL, 60134
Phone (630) 208-3000
Fax (630) 762-7882
Enumeration date Jun 16, 2010
Last updated in NPPES Mar 17, 2018
Taxonomy & licenses
207R00000X Internal Medicine Physician Allopathic & Osteopathic Physicians · License 036131483 (IL) Secondary
207R00000X Internal Medicine Physician Allopathic & Osteopathic Physicians · License 125058545 (IL) Secondary
208M00000X Hospitalist Physician Allopathic & Osteopathic Physicians · License 036.131483 (IL) Primary
DO · Doctor of Osteopathic Medicine: A fully licensed physician trained in osteopathic medical schools, with the same practice rights as an MD.
About the DO credential
Other identifiers
| Identifier | Type | State | Issuer |
|---|---|---|---|
| 206147 | Other | IL | MEDICARE PTAN (GROUP) |
| P01248045 | Other | IL | MEDICARE RAILROAD PTAN (INDIVIDUAL) |
| 206147241 | Other | IL | MEDICARE PTAN (INDIVIDUAL) |
| CA4748 | Other | IL | MEDICARE RAILROAD PTAN (GROUP) |
| 036131483 | Medicaid | IL | - |
What is an NPI number?
A National Provider Identifier (NPI) is a unique 10-digit number that CMS assigns to every U.S. healthcare provider and organization under HIPAA. Type 1 NPIs identify individual providers; Type 2 NPIs identify organizations. The NPI appears on insurance claims, prescriptions, and credentialing paperwork, and never changes, even if the provider moves or changes specialty.
Frequently asked questions
Is this the official NPI registry?
No. NPI Portal is a private site built on public CMS NPPES data. The official registry is npiregistry.cms.hhs.gov, operated by CMS.
What specialty is Brian Poustinchian?
Brian Poustinchian is registered in NPPES with the primary taxonomy of Hospitalist Physician. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.
Other providers at this practice address
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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2018-03-17.